Attachment for woodworking-shapers



v I w. A. HENN. ATTACHMENT FOR WOODWORKING SHAPERS'.

APPLICATION FILED JULY 2 9, 1920.

Patented May 17', 1921,

' 2 SHEETS-SHEET 1,

INVEIVTUR WA??? ATTORNEYS W.- A. HENN.

ATTACHMENT ron wooowoaxme swans.

- 'APPLICAHON FILED JULY 29,1920- 1,378,350, Patented May17, 1921.

2 SHEETS-SHEET 2- A TTORNEYS ATENT OFFICE.

WILLIAM A. HENN, OF EVANSVILLE, INDIANA, ASSIGNOR OF ONE-HALF TO MICHAEL D. HELFRICH, OF EVANSVILLE, INDIANA.

, ATTACHMENT FOR WOODWORKING-SHAPERS.

- Specification of Letters Patent. Patented May i7, 1921;.

Application filed July 29, 1920. Serial No. 399,865.

To all whom, it may concern:

Be it known that I, WILLIAM A. HENN, a citizen of the United States, and a resident of Evansville, in the county of Vanderburgh and State of Indiana, have invented a new and useful Improvement in Attach ments for Woodworking-Shapers, of which the following is a full, clear, and exact description.

My invention relates to improvements 1n attachments for woodworking shapers, and it consists in the combinations, constructions, and arrangements herein described and claimed:

An object of my invention is to provide an attachement for woodworking shaper having means for automatically holding the work to be shaped in contact with the cutting knives and for moving the work to 0o casion the shaping of the same in the man ner required.

A further object of my invention is to provide a device of the type described that has means for automatically varying the speed of movement of the work being shaped to compensate for differences in the hardness of different grades of wood used and to permit the work being moved more slowly when the knives are cutting against the grain than when the work is being out in the direction of the grain.

A further object of my invention is to provide a device of the type described that will function with equal effectiveness when either inside cuts or outside cuts are be ing made in the work.

A further object of my invention is to providea device of the type described that is relatively simple in construction and operation, not likely to get out of order easily, and thoroughly practical commercially.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings, forming part of this application, in which Figure 1 is a plan view of a woodworking shaper, showing the device applied,

Fig. 5 is a detail of another portion ofthe device,

Fig. 6 is a detail of still another. portion of the device,

Flg. 7 is a section through still another portion of the device, a fragmentary portion of the woodworking shaper being shown in section.

Prior to my invention it has been necessary for the operatorto maintainthe work in contact with the cutting blades by bearing his weight thereon and to movethe same manually in order to shape the work as required. Consequently, a high degree of skill was required in performing the work satisfactorily and the danger of injury to the operator was great in that the slightest mismovement of the operator would bring a portion of his body in contact with the cutting knives and there was the further danger that splinters flying from the work might injure him. In addition, a large percentage of work was spoiled during the shaping operation. When my improved attachment is applied to a woodworking machine, the shaping is mechanicallyperformed in that the work is automatically held against the cutting knives and is moved as required to insure the out being made, as desired. The necessity for employing a skilled operator is-obviated and the production is greatly increased with a saving in time, labor, and

material.

In carrying out my invention, I make use of an ordinary woodworking machine havlnga table 1 with spaced apart drive spindles 2 and 3 projecting therefrom to drive the cutting knives 4 and 5 which are disposed in recesses, such as shown at 6 inFig.

7. The parts described so far are ordinary in construction and form no part of my invention, except in so far as they cooperate with the parts about to be described.

I then provide a supporting member 8 that is removably secured to the edge of the table 1 at a point approximately equi-distant from the drive spindles 2 and 3 when a lateral portion 9 thereof, which restsupon the table l, is secured thereto in any suitable manner as by means of bolts (not shown). The supporting member 8 is formed with an integral vertically extending spindle 10 and with a recess 10 in its lower side. A bracket 12 formed with a recess 19 through which the spindle 10 extends, rests upon the supporting member 8 and has a depending extension formed with a collar 12 that bears against the side and the lower portion of the supporting member 8, being secured 1n position by a pin 11 that is projected therethrough and has a threaded portion screwed in the threaded recess 10.

The bracket 12 is formed with a lateral extension 14 that carries at its end an integral substantially U-shaped carrier 15. The

side arms of the U-shaped carrier 15 are provided with registering openings in which seen in Fig. 1 of the drawings.

The recess 19 in the bracket 12 is consid erably greater in diameter than the spindle 10 and is adapted to receive the bushing portion 20 of the bracket 20 that has a lateral extension 21 provided with a substantially U-shaped carrying member 22 at its end. The side portions ofthe carrying member 22 have registering openings in which the ends of a stub shaft 23 are journaled. That portion of the stub shaft 23 disposed between the side arms of the car rying member 22 is enlarged and formed into a worm 24 and a gear 25, as clearly shown in Fig. 1 of the drawings. A pulley 28 having its hub 27 extended and the end thereof fashioned into a worm 26, is loosely mounted upon the spindlelO, the hub portion being placed on the spindle first, wherefore the worm 26 meshes with the gears 18 and of the stub shaft 16 and 23 respectively. The pulley 28 is driven by a belt29 that is in turn driven by a pulley 30 keyed to the extended upper end of the drive spindle 3, as shown in Fig. 2. The pulley 30 is maintained in position by a collar 31.

A shaft housing 32 is provided for a shaft 33 that has a gear 37 at its end maintained in engagement with the worm 24. Thls is accomplished by means of a fastening sleeve 34 that is loosely mounted on the shaft 33 between the end of the shaft housing and the gear 37 and is provided with spaced apart side arms and 36, which are loosely mounted on the ends of the stub shaft 23- projecting beyond the side members of the carrier 22.

A second shaft housing 38 is provided for a shaft 39 that carries a gear 43 at its end. The gear 43 is maintained in engagement with the worm 17 by a sleeve loosely mounted on the shaft 39 between the end of tical and I shall therefore confine my de-- scription to the parts associated with the shaft 33. The same reference numerals have been used to denote corresponding precisely identical parts throughout.

Referring now to Fig. 3 of the drawings, it will be noted that the free end of the shaft housing 32 carries a bracket 44 having upwardly extending spaced apart lugs 45 formed with horizontally alined openings 46. The bracket 44 is also formed. with depending spaced apart lugs 47 having horizontally alined openings 48 pro vided therethrough. A clutch member 49 having teeth 50 and formed with an annular groove 51 in its outer wall is feathered on the shaft 33 and may be moved therealong by operation of a trip member 53 that is pivoted on a pin 54 extending through the openings 48, since the trip member 53 has forks received within the annular groove 51. The trip member 53 has a downwardly depending extension or trigger 55 and is operated by movement thereof as will be hereinafter set forth. A collar 56 is rigidly secured on the shaft 33 by a pin 57 and maintains the hub 59 of a disk 58 out of contact with the clutch member 49 when the latter is in the position pictured in Fig. 3. The end of the hub 59 is provided with clutch teeth 61 adapted to engage with the teeth of the clutch member 49 when the latter is moved in contact therewith. The collar 56 is then received within a central recess (not shown) provided in the adjacent face of the clutch member 49. The inner end of the hub 59 is fashioned to form a ratchet wheel 66. A pawl 87 pivoted at 88 to the bracket 44 engages with the teeth of the ratchet wheel to prevent rotation of the disk 58in one direction. The disk 58 is otherwise free to rotate on the shaft 33 except as will be hereinafter set forth. The peripheral edge of the disk is received within an annular recess 62 in the inner wall of the forwardly projecting beveled toothed portion of a disk 63 that is loosely mounted on the shaft 33 and is maintained in p0-' the end 81.

sition th'ereon by a collar64. The forwardly projecting beveled portion of the disk 63 is also provided with inwardly extending teeth 66 which mesh with the teeth of a plurality of spaced apart gears 70. The gears 70 are looselymounted onstub shafts 71 "projecting from the disk 58 and are driven by gears 68, which are loosely mounted on stub shafts 69 which also project from the disk 58. The gears 68 are driven by a central gear 67 that is rigidly mounted upon the shaft 33 to rotate therewith.

The teeth of the beveled forwardly extending portion 65 of the disk 63 mesh with 15' that is bent upwardly at 79 to avoid the beveled gear 65 and ispivoted adjacent its inner end-between the lugs 45 on a pivot 80 that is projected through the openings 46. The inner end 81 of the lever 78 is adjustably spaced from the shaft housing 32 by means of a vertically extending threaded rod 82 resting on the shaft housing 32 and having nuts 83 screwed 011 its threaded end portions that project above and below The free end of the lever 7 8 is provided with a handle 84 for convenient operation thereof and has an inclined roller 85 journaled therein and positioned to bear upon the upper surface of the cap portion of the templet 7 6 adjacent the edge thereof.

The templet 76 is secured to the work 88 to be shaped in any suitable manner as by means of wood screws 89.

From the foregoing description of the various parts of the device,- the operation thereof may be readily understood. It will be understood that the drive spindles 2 and 3 may be operated independently of each other and that the knives carried by one of the drive spindles is ordinarily, used in accomplishing inside cuts, while the other may be used for outside cuts.

When an inside out is being made, the head of the spindle projects within the recess 86 of the templet, as shown in big. 7 the cutting knives being then brought into contact withthe inner side of the work 88. The workis then maintained against the cutting knife 5 by a counter weight (not shown)xthat depends from the end of a cable 90 that is secured to the shaft housing 38, as shown in Fig. 1. The

' cable extends through aguiding member 91 that is secured to the table 1. v

The work is of course operated by means of the driven shaft 39 through the medium of the beveled gear teeth 65, which engage the beveled gear 73 that is carried by the templet 76. The weight of the lever 78 will maintain the work in position, this being particularly true, since the roller 85 is always in position to press downwardly against that portion of the work being engaged by the cutting blade. The position of the lever 78 with respect to the cap of the templet 76 maybe adjusted by means of the threaded rodi82 when the nuts 83 are adjusted as desired on the shankthereof. Consequently, the device can be used effectively with work varying in thickness. When an outside cut is-being made, the templet 76 with the work underneath is positionedin contact with the cutting knives as shown in Fig. 1, and the work is maintained against the cutting knives by a' counterweight 92 that depends from the cable 93 that'has-its inner end secured to the shaft housing '32. The cable 93 is guided by a pulley 94 mountedin a bracket 95 secured to the table 1, as shown.

It is frequently desired to change therate ofmo vement of the work being shaped. For instance, when the work is being out against the grain, it is essential that the same be turned more slowly than when the workis being cut with the grain. Other- Wise, the work may be splintered and spoiled. To occasion'this result, I provide cam members 96 on the upper surface of the templet 76 positioned to engage with the trigger 55 of the trip member 53. The clutch 'member 49 is moved out of engagement with the clutch teeth 61 while the trigger 55 isin contact with the cam members 96. Consequently, the speed of rotation of the beveled gear 65 will be greatly reduced. The cam members'96 are provided to lessen the speed of movement of the work when inside cuts are being made. Similar cam members 97 are provided to engage with the trigger 55 when outside cuts arebeing made to accomplish the same result.

spring 72 connecting the trigger 55 clutch teeth 61. Consequently, the speet of rotation of the disk 63 carrying the beveled gear teeth 65 is determined by the speed of rotation of the shaft 33, since the disk 63 and the disk 58 will rotate as a unit.

Vhen the clutch member 49 is moved out of engagement with the clutch teeth 61 in the manner described, the speed of rotation of the disk 63 is then determined by the speed of rotation of the gears 7 O which mesh with the internal gear teeth 66. vVhen the clutch member 49 disengages the clutch teeth 61,

gagement of the gear 73 with the gear Wheel '63 would tend to hold the latter stationary while the disk 58 was rotated on account of the operation of the gear train disposed between the internal gear teeth 66 of the gear wheel 63 and the shaft 38. Since the disk 58 is held against rotation, the gear wheel -63 will be rotated in the same direction as templet, not shown, that would be formed in the shape desired. Also the cam members regulating the speed of rotation of the beveled gear 73 may be positioned to meet the requirements of each particular case.

I claim:

1. The combination with a woodworking shaper of a supporting member removably secured thereto, a shaft housing connected at one end with said supporting member for movement in both horizontal and vertical planes, and means carried by the shaft housing for maintaining the work in contact with the cutting blade and for moving the work to insure the shaping of the same as desired.

.2. The combination with a woodworking shaper of a supporting member removably secured thereto at a point approximately equi-distant from the cutting knives of said shaper, a pair of shaft housings, each connected at one end with said supporting member for movement in vertical and horizontal planes, a rotatable shaft journaled in each shaft housing, means for operating said shaft simultaneously, means associated with each shaft housing at its free end for maintaining work in contact with the adjacent cutting blade, and means operated by the operation of each shaft for moving work with respect to each cutting blade to insure the proper shaping of each article of work. 7

3. In a device of the type described, a supporting member having an upright spindie, a bracket rotatably mounted on the spindle, saidbracket being formed with spaced apart horizontally alined arms, a stub shaft having its ends mounted in said arms, a shaft housing mounted on said stub shaft for movement in a vertical plane thereabout, a rotatable shaft journaled in the housing, means for rotating the shaft, and means operated by the rotation of the shaft for moving the work engaged by said means to insure the proper shaping of the same.

4. In a device of the type described, a supporting member having an upright spindle, a bracket rotatably mounted on the spindle, said bracket being formed with spaced apart horizontally alined arms, a stub shaft having its ends mounted in said arms, a shaft housing mounted on said stub shaft for movement in a vertical plane'thereabout, a rotatable shaft journaled in the housing, means for rotating the shaft, and means operated by the rotation of the shaft for moving the work engaged by'said means to insure the proper shaping of the same, said last named means including automatic means for changing the rate of movement of the work.

5. In a device of the type described, a supporting member removably secured to the table of the shaper, a tubular shaft housing having one end connected with the table for movement thereabout in both vertical and horizontal planes, a shaft journaled in the housing and having its outer end projecting therefrom, a clutch member feathered on the shaft, a bevel gear loosely mounted upon the shaft adjacent its end, said bevel gear being provided with inwardly extending teeth, a disk having a rear- Wardly extending hub formed with clutch teeth, said disk being loosely mounted upon said shaft between said first named clutch member and said bevel gear, a gear keyed to said shaft and positioned to drive a gear train carried by said disk to occasion the rotation of said bevel gear in the same direction as the shaft, means for maintaining said first named clutch member normally in engagement with said second named clutch teeth to cause the rotation of said shaft and said bevel gear as a unit, means for holding said first named clutch member out of engagement with said second named clutch teeth, means for preventing rotation of said disk in one direction, thereby occasioning the rotation of said bevel gear at a speed determined by the ratio of said second named gear thereto, means operated by the operation of said bevel gear for moving the,

work to be shaped and for operating said last named means, and means carried by said shaft housing and positioned to cooperate with said last named means for maintaining the work in contact with the cutting blade.

6. The combination with a woodworking shaper of a supporting member carried thereby, a member connected at one end to said supporting member for movement in both horizontal and vertical planes, and means carried by said second named member for maintaining the work in contact with the cutting blade and for moving the work to insure the shaping of the same as desired.

7. The combination with a woodworking shaper of a supporting member carried thereby, a member connected at one end to said supporting member for movement in both horizontal and vertical planes, means carried by said second named member for moving the work to insure the shaping of the same as desired, and means engaging with said last named means for automatically varying the rate of movement of the work.

8. The combination with a woodworking shaper of a supporting member removably secured thereto, a shaft housing connected at 10 one end with said supporting member for movement in both horizontal and vertical planes, and means carried by the shaft housing for moving the work to insure the shaping of the same as desired.

WILLIAM A. HENN. 

